Cryptography & Security
🔐 What is a Cryptographic Hash?
A hash function takes an input (or 'message') and returns a fixed-size string of bytes. It is a one-way mathematical function.
Unlike encryption (which is designed to be reversed with a password), hashing is a one-way street. Once a string is hashed, it is computationally infeasible to reverse it back to the original text.
The Key Properties of a Hash
- Deterministic: The same exact input will always produce the exact same output hash.
- Quick: It's fast to compute the hash value for any given message.
- Infeasible to reverse: You cannot generate a message from its hash value except by trying all possible messages (brute-forcing).
- Avalanche Effect: A tiny change to a message should change the hash value so extensively that the new hash appears uncorrelated with the old hash. (Try adding a single period to your text and watch the hashes radically alter).
- Collision Resistant: It should be virtually impossible to find two different messages with the same hash.
Why are they used?
Hashes are the foundation of digital security. They are used to securely store passwords in databases (so even if the database is hacked, the passwords aren't exposed in plain text), verify the integrity of downloaded files, and generate digital signatures.
Is this safe?
Yes. Our tool is 100% Client-Side. Tooleble utilizes the crypto.subtle API built directly into modern web browsers, meaning your input text never leaves your device and is never sent to our servers.